Subaru WRX, VA (USA / CAN)

Manual transmission fluid capacity & service interval

Subaru WRX, VA (USA / CAN) manual transmission fluid capacity ranges from 3,3 to 4,1 liters. Service intervals include checking at 30000 miles or 30 months and changing at 15000 miles or 15 months. The data covers 6 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
WRX STI 2.5T (2018-2021)
  • Use: Normal
  • Capacity 4,1 liter
  • Check 30000 miles/ 30 months
  • Code: 6/1
WRX STI 2.5T (2018-2021)
  • Use: Severe
  • Capacity 4,1 liter
  • Change 15000 miles/ 15 months
  • Code: 6/1
WRX 2.0T (2014-2021)
  • Use: Normal
  • Capacity 3,3 liter
  • Check 30000 miles/ 30 months
  • Code: 6/1
WRX 2.0T (2014-2021)
  • Use: Severe
  • Capacity 3,3 liter
  • Change 15000 miles/ 15 months
  • Code: 6/1
WRX STI 2.5T (2014-2018)
  • Use: Normal
  • Capacity 4,1 liter
  • Check 30000 miles/ 30 months
  • Code: 6/1
WRX STI 2.5T (2014-2018)
  • Use: Severe
  • Capacity 4,1 liter
  • Change 15000 miles/ 15 months
  • Code: 6/1

Additional Notes

  • The Subaru WRX VA manual transaxle holds 3.3 liters of fluid, while the WRX STI manual transaxle holds 4.1 liters — a difference of 0.8 liters that reflects the STI's larger, more robust gearbox unit.
  • The 4.1-liter capacity of the WRX STI 2.5T transaxle applies consistently across both the 2014-2018 and 2018-2021 model year groupings, indicating no change in the physical gearbox fill volume between those periods.
  • Under normal use conditions, the WRX 2.0T manual transaxle fluid is subject to a check interval of 30,000 miles or 30 months, rather than a full fluid change at that point.
  • Under normal use conditions, the WRX STI 2.5T manual transaxle fluid follows the same check interval structure — 30,000 miles or 30 months — as the standard WRX 2.0T.
  • Under severe use conditions, both the WRX 2.0T and WRX STI 2.5T transaxles require a fluid change at 15,000 miles or 15 months, cutting the service interval in half compared to the normal-use check schedule.
  • The interval structure for the WRX STI 2.5T transaxle remains identical between the 2014-2018 and 2018-2021 model year groupings, with severe-use changes specified at 15,000 miles or 15 months in both cases.

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